Convert Ogg Vorbis (.ogg) to Free Lossless Audio Codec (.flac) online for free. Fast, secure audio conversion with no watermarks or registration.
Conversion settings — add a file to adjust
Upload your .ogg file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .flac file when it's ready.
OGG Vorbis is Xiph.org's lossy audio codec, delivering excellent quality at moderate bitrates. FLAC (Free Lossless Audio Codec), also from the Xiph.org family, is the universal open-source lossless standard. Both share the Xiph.org lineage — Vorbis comments work identically in both formats, and they share the same metadata system. FLAC achieves 50-60% compression compared to raw PCM.
Converting OGG to FLAC decodes the Vorbis audio to PCM and re-encodes it losslessly. The FLAC output preserves the full decoded quality of your OGG source in a lossless container, creating a permanent archive that won't degrade with future transcoding operations.
FLAC provides a lossless safety net for your OGG audio. If you need to transcode to AAC, MP3, or any other format in the future, starting from FLAC avoids the generation loss of transcoding from one lossy format to another. The FLAC file captures the full fidelity of what Vorbis preserved.
Since OGG Vorbis and FLAC share the Xiph.org metadata system (Vorbis comments), tag compatibility is perfect — every metadata field transfers directly without mapping or translation. Album art, ReplayGain values, and custom tags all carry over seamlessly.
FFmpeg decodes the Vorbis stream to PCM and encodes using the FLAC encoder. Since both formats belong to the Xiph.org ecosystem, Vorbis comments transfer directly to FLAC without any metadata mapping — they use the identical tag system. FLAC compression levels 0-8 trade speed for size without affecting quality. The encoder stores an MD5 checksum of the decoded PCM for integrity verification. The output preserves the source sample rate, bit depth, and channel layout.
FLAC encoding is lossless — every decoded Vorbis sample is preserved exactly. The overall pipeline is bounded by the OGG source quality: FLAC cannot restore information Vorbis discarded. The benefit is that future transcoding from FLAC avoids the double-lossy problem. FLAC files are larger than OGG (roughly 5-6 MB/min vs 1.2 MB/min for Vorbis Q5) because lossless compression preserves all decoded audio data.
| Device | OGG | FLAC |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Native | Native |
| Linux | Partial | Native |
| Web Browser | Native |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
OGG to FLAC converts lossy Xiph.org audio to lossless Xiph.org audio with perfect metadata compatibility. Use FLAC as a lossless archive to prevent further generation loss.
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| No |
| الميزة | OGG | FLAC |
|---|---|---|
| الاسم الكامل | Ogg Vorbis | Free Lossless Audio Codec |
| الامتداد | .ogg | .flac |
| الأفضل لـ | Open source | Lossless compression |